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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />O L O <br />F <br />Denver, Colorado 80203 DD <br />F <br />ION O <br />Phone: (303) 866-3567 RECLAMATION <br />FAX: (303) 832-8106 MINING <br />April 28, 2011 SA &TY <br />Brian A. Watterson <br /> <br />Twentymile Coal Company, LLC John W. Hickenlooper <br />Governor <br />29515 Routt County Road #27 Mike King <br />Oak Creek, CO 80467 Executive Director <br /> Loretta E. Pineda <br />RE: Foidel Creek Mine (Permit No. C-82-056) Director <br />2010 Annual Hydrology Report Review <br />Dear Mr. Watterson, <br />The Division has completed its preliminary review of the above referenced report received on 14 <br />March 2011. We appreciate your submittal of this report, as the report clearly presented the hydrologic <br />monitoring data for the mine. The Division finds the 2010 Annual Hydrology Report (AHR) in <br />compliance with the requirements identified in the attached memo. Please give further attention to the <br />following items. <br />1. Page 7, paragraph 3 indicates tables 15 through 17 provide summaries of the 2006 Water Year <br />data collected at each site (91 M001 and 91 M004). Please indicate if the theses referenced <br />tables are summaries of the 2006 Water Year or the 2010 Water Year. <br />2. List of Tables, Tables 2a-59a are listed as Summaries of Water Quality Data for a specific site. <br />These tables are identical to the same numbered tables as found in the 2009 AHR. Please <br />indicate if it is the intention of TCC to include the same data in the tables for both water years <br />2009 and 2010. <br />3. Please address the any discrepancies identified with 2010 water quality tables associated with <br />the 2010 AHR. These discrepancies are noted in the comment section of item number 12 on <br />the attached memo titled, Review of Annual Hydrology Report. <br />Please feel free to contact me with any questions at (303) 866-3567 ext 8134. <br />Sincerely, <br />CJason M <br />Environmental Protection Specialist <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines